From Joss Whedon, the creator of Buffy the Vampire Slayer and Firefly, comes Dr. Horrible's Sing-Along Blog. Neil Patrick Harris stars as Dr. Horrible, an aspiring super-villain, whose attempts at villainy are constantly thwarted by his nemesis, the heroic Captain Hammer (Nathan Fillion). He must take his efforts to the next level in order to get into the Evil League of Evil while also mustering the courage to talk to Penny (Felicia Day), the girl at the laundromat. And it's a musical.